Update now! Insist on the 2013 edition of NFPA 22 for adequate water supply in private fire protection systems.

The 2013 NFPA 22: Standard for Water Tanks for Private Fire Protection provides the industry's most up-to-date requirements for the design, construction, installation and maintenance of tanks and accessory equipment that supply water for private fire protection, including foundations, towers, pipe connections and fittings, and valve enclosures.

Only this edition provides the Standard's first definition for "suction tank" along with other significant revisions: